Doom Walkthrough :

This walkthrough for Doom [XBOX 360] has been posted at 06 Jan 2010 by BlackRiku and is called "XBL Arcade Achievement Unlocking Guide". If walkthrough is usable don't forgot thumbs up BlackRiku and share this with your freinds. And most important we have 1 other walkthroughs for Doom, read them all!

Walkthrough - XBL Arcade Achievement Unlocking Guide

Doom Achievements: Unlocking Achievements in Doom for Xbox 360/Xbox Live Arcade
Achievement | Minimum requirement to unlock Achievement | G
--------------|------------------------------------------------------------|---
CLEAN SLATE...|.Get a 100% Kills score on any map at Difficulty 3, 4 or 5..|..5
DESTROYER.....|.Get 100 Frags in Deathmatch-mode game(s) on Xbox Live......|.10
EPISODE ONE...|.Exit maps 1 through 8 in Episode 1 at Difficulty 3, 4 or 5.|.25
EPISODE TWO...|.Exit maps 1 through 8 in Episode 2 at Difficulty 3, 4 or 5.|.25
EPISODE THREE.|.Exit maps 1 through 8 in Episode 3 at Difficulty 3, 4 or 5.|.25
EPISODE FOUR..|.Exit maps 1 through 8 in Episode 4 at Difficulty 3, 4 or 5.|.25
HOARDER.......|.Get a 100% Items score on any map at any Difficulty........|..5
NEOPHYTE......|.Exit any map at any Difficulty.............................|.20
NIGHTMARE.....|.Exit any map at Difficulty 5...............................|.10
RAMPAGE.......|.Exit maps 1 through 8 in all Episodes at Difficulty 4 or 5.|.35
ROOKIE........|.Get 50 Frags in Deathmatch-mode game(s) on Xbox Live.......|.10
SCOUT.........|.Find any "official" Secret on any map at any Difficulty....|..5
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Notes: The "G" column shows the "Gamerscore" points for unlocking Achievements.
All Achievements are unlocked in Single-player games except for DESTROYER and
ROOKIE, which are only unlocked in Deathmatch-mode games played on Xbox Live.
In general, unlocks only occur after players exit a map or complete an Episode.
Difficulty 1 is "I'm too young to die!", Difficulty 2 is "Hey, not too rough!",
Difficulty 3 is "Hurt me plenty!", Difficulty 4 is "Ultra-Violence", Difficulty
5 is "Nightmare".
Note that Lost Souls ("flying skulls") are not counted when computing the Kills
score. As such, the CLEAN SLATE Achievement can be unlocked on any map even if
Lost Souls remain when the player exits.
Unlocking the CLEAN SLATE Achievement can also unlock a "Marine" Gamer Picture,
which can be used when customizing Player Profiles. (This picture is unlocked
if a "KILLS 100%" score is attained at any time.)
In order for "Frags" to be counted for the DESTROYER or ROOKIE Achievement, a
Deathmatch game must reach a Fraglimit or Timelimit, and end by displaying the
Tally Screen. (Frags are not counted for a Deathmatch player unless the Tally
Screen at the end of the match is displayed for that player.)
For the EPISODE and RAMPAGE Achievements, it is not necessary to find or exit
any Secret map (every Episode has 8 "regular" maps and 1 Secret map, which is
accessible via a second, hidden exit on one of the regular maps). For a list
of maps and their interconnections access: http://classicdoom.com/doomexit.htm
For the HOARDER Achievement, "Items" include only Berserk Packs, Blur Artifacts
(also called Partial Invisibility), Computer Maps (also called Computer Area
Map), Health Potions (blue bottle, also called Health Bonus), Invulnerability
Spheres (green sphere), Light Amplification Visors, Soul Spheres (blue sphere,
also called Supercharge), and Spiritual Armor (green helmet, also called Armor
Bonus); All other objects in the game can be ignored.
Unlocking the NIGHTMARE Achievement also unlocks a "Demon" Gamer Picture, which
can be used when customizing Player Profiles.
To unlock the SCOUT Achievement a player must step onto any horizontal surface
that is flagged as a score-affecting secret area. For more information on
score-affecting secrets in Doom games access: http://classicdoom.com/maxsec.htm
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